Title :
The LEP OPAL Trigger and VME Based Data Collection
Author :
Brisson, J.C. ; Farthouat, Ph. ; Oandois, B. ; Oentit, F.X. ; Hajar, V. ; Le Dû, P. ; Lesquoy, E. ; Mallet, J. ; Rougvin-Baville, P. ; Zylberajch, S.
Author_Institution :
DPhPE, CEN - Saclay 91191 , Oif sur Yvette CeBx (France)
Abstract :
The LEP OPAL data collection process is based on a distributed architecture of the 16/32 bit MC 68000 microprocessors associated with a coherent use of the VME bus. This paper describes this system which collects data from each detector branch and delivers the information through a hierarchical tree structure to a VME matrix interface where individual events are assembled and filtered, ready for delivery to mass storage.
Keywords :
Assembly systems; Data acquisition; Electrons; Event detection; Hardware; Mesons; Microprocessors; Radiation detectors; Table lookup; Tree data structures;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.1986.4337059
